diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 7987028..766470d 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -51,13 +51,20 @@ public Exercise(int age) {
         Create a constructor that accepts both a String and an int as parameters, in that order, and assign the values
         provided to the name and age members
      */
+    public  Exercise(String name, int age) {
+        this.name = name;
+        this.age = age;
+
+    }
 
 
 
     /*
         2. Create a method named add that accepts two integers. The method should return the numbers added together.
      */
-
+    public int add(int age1, int age2) {
+        return age1 + age2;
+    }
 
 
     /*
@@ -65,6 +72,10 @@ public Exercise(int age) {
         together with a space in between.
      */
 
+    public String add(String name1, String name2) {
+        return (name1 + " " + name2);
+    }
+
 
 
 }
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index 62b878f..81316e3 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -2,12 +2,15 @@
 
 import com.booleanuk.helpers.ExtensionBase;
 
+import java.util.Arrays;
+
 public class Extension extends ExtensionBase {
     /*
         Implement the following methods:
 
         1. add, which accepts two floats and returns a float (both floats added together)
 
+
         2. add, which accepts two doubles and returns a double (both doubles added together)
 
         3. subtract, which accepts two floats and returns a float (first float minus second float)
@@ -26,5 +29,39 @@ public class Extension extends ExtensionBase {
         multiply(["2", "7", "3"], 3) -> [6, 21, 9]
      */
 
+    public float add(float f1, float f2) {
+        return f1 + f2;
+    }
+
+    public double add(double d1, double d2) {
+        return d1 + d2;
+    }
+
+    public float subtract(float f1, float f2) {
+        return f1 - f2;
+    }
+
+    public String subtract(String d1, char d2) {
+        return d1.replace(d2 + "", "");
+    }
+
+    public int multiply(int f1, int f2) {
+        return f1 * f2;
+    }
+
+    public String multiply(String d1, int d2) {
+        String returnValue = "";
+        while (d2 > 1) {
+            returnValue += d1 + ",";
+            d2 --;
+        }
+        return  returnValue + d1;
+
+    }
+
+    public int[] multiply(String[] d1, int d2) {
+        return Arrays.stream(d1).mapToInt(x -> Integer.parseInt(x) * d2).toArray();
+
+    }
 
 }